Removes Conan build step, adds documentation to dictionary.

src/Collections/Dictionary.hpp

@@ -12,7 +12,9 @@ namespace ArbUt {
         using const_iterator = typename std::unordered_map<KeyT, ValueT>::const_iterator;
 
     public:
+        /// @brief The type used for the indexer of the dictionary.
         typedef KeyT keyType;
+        /// @brief The type used for the value in the dictionary.
         typedef ValueT valueType;
 
         Dictionary() : _map() {}